CN115189965B - Cross-chain management system and cross-chain operation method of block chain - Google Patents

Abstract

The present invention relates to the field of information technology, in particular to a blockchain cross-chain management system and a cross-chain operation method. The cross-chain management system includes setting a management platform program on each blockchain participating in cross-chain management, and a management platform program It includes an access module, an audit module and an interaction module. The access module sends an access request to the audit module of the superior blockchain. After the audit module passes the audit, it exchanges blockchain identification information, identity verification information and agreed secrets with the access module. key, the interaction module periodically sends interaction requests to the upper-level blockchain, and the interaction module of the upper-level blockchain establishes an encrypted communication connection with the interaction module of the lower-level blockchain after verification, and sends the operation information of the lower-level blockchain to the upper-level blockchain Interaction module, the upper-level blockchain interaction module generates transaction information and packs the lower-level blockchain operation information into block storage. The substantive effect of the present invention is to realize the cross-chain operation and cross-chain management of the block chain, and at the same time ensure the safe operation of the block chain.

Description

A blockchain cross-chain management system and cross-chain operation method

technical field

The invention relates to the field of information technology, in particular to a blockchain cross-chain management system and a cross-chain operation method.

Background technique

Blockchain technology can establish a natural trust environment and simplify business processing procedures, and has been continuously developed and applied in recent years. At present, public chains, private chains, and alliance chains are widely used. The alliance chain is only aimed at members of a specific group and limited third parties. It internally designates multiple pre-selected nodes as bookkeepers, and the generation of each block is jointly decided by all pre-selected nodes. Other access nodes can participate in transactions, but do not intervene in the accounting process. The main groups used by the alliance chain are banks, insurance, securities, business associations, group companies and upstream and downstream enterprises. There are more and more blockchains deployed by the same enterprise, resulting in more frequent interoperability between chains. In order to facilitate business operations across blockchain systems, it is necessary to study cross-chain management and operating technologies.

For example, Chinese patent CN113228076A, published on August 6, 2021, discloses a blockchain management system. Although it can realize cross-chain transactions, it cannot realize cross-chain management and operation.

Contents of the invention

The technical problem to be solved by the present invention is: at present, there is a technical problem that there is a lack of a blockchain cross-chain management and operation scheme that is both safe and convenient. A blockchain cross-chain management system and cross-chain operation method are proposed, which can facilitate the cross-chain management and cross-chain operation of the blockchain under the premise of ensuring the safe operation of the blockchain.

In order to solve the above technical problems, the technical solution adopted by the present invention is: a blockchain cross-chain management system, which is used for cross-chain management of several alliance chains and/or private chains, including The management platform program is set on the block chain, and the management platform program runs on each node of the block chain. A node sends an access request to the review module of the superior block chain through the access module, and after the review module passes the review, it exchanges block chain identification information, identity verification information and agreed secret keys with the access module, and respectively Sent to the respective interaction modules for storage, the interaction modules of the lower-level blockchain periodically send interaction requests to the interaction modules of the upper-level blockchain, the interaction requests include blockchain identification information and identity verification information, and the interaction of the upper-level blockchain After the module is verified, an encrypted communication connection is established with the interactive module of the lower-level blockchain, and the lower-level blockchain interactive module sends the operation information of the lower-level blockchain to the interactive module of the upper-level blockchain, and the transaction information generated by the interactive module of the upper-level blockchain will be The lower-level blockchain operation information is packaged into block storage.

Preferably, the blockchain identification information is the unique identification ID of the blockchain, and when the unique identification ID is created by the blockchain, it is obtained by applying to any node of the blockchain running the management platform program. The identity verification information includes attribute verification information and ciphertext verification information. The attribute verification information is the identity information, block chain type information and business attribute information assigned by the upper-level blockchain to the lower-level blockchain when establishing a superior-subordinate relationship. The ciphertext verification information is the paired secret key information agreed between the upper-level blockchain and the lower-level blockchain. When the upper-level blockchain interaction module receives the interaction request sent by the lower-level blockchain interaction module, it will verify that the interaction request carries Whether the unique identification ID, identity information, blockchain type information, and business attribute information of the user match the stored ones. If they do not match, the interaction will be rejected. If they match, the ciphertext verification information carried in the interaction request will be verified. If the verification fails, then Reject the interaction, if the verification is passed, generate the encryption key for this interaction, and send the encryption key to the interaction module of the lower-level blockchain through the agreed key, and the interaction module of the lower-level blockchain uses the encryption key to convert the blockchain The operation information is encrypted and sent to the interactive module of the upper-level blockchain.

Preferably, the interaction module of the node of the upper-level blockchain sends a data interaction request to the interaction module of the node of the lower-level blockchain, and the data interaction request includes attribute verification information, ciphertext verification information, data interaction instructions and interaction keys, The lower-level blockchain interaction module verifies whether the attribute verification information matches the lower-level blockchain. If it does not match, it rejects the interaction. If it matches, it verifies the ciphertext verification information. If the verification fails, it rejects the interaction. If it passes the verification, it executes data interaction. The data interaction instruction in the request encrypts the read data with the interaction key and feeds it back to the node of the upper-level blockchain, and the upper-level blockchain node stores the obtained data locally.

Preferably, the data interaction instructions include instructions for reading the current block height, instructions for reading specified block data, instructions for verifying transaction specified transaction information, and instructions for adding transaction information. Each data interaction instruction is associated with a permission level, and the lower level The interaction module of the blockchain stores a permission table, and the permission table records the permission level corresponding to the identification information of the blockchain.

Preferably, after the audit module of the upper-level blockchain audits the access request, the audit module of the upper-level blockchain generates an encrypted polynomial f(x), generates a value set E of the argument x, and calculates the encrypted polynomial f(x) in Take the polynomial value on the value set E to generate the equivalent polynomial f'(x), the polynomial value of the equivalent polynomial f'(x) on the value set E is the same as the encrypted polynomial f(x), and the equivalent polynomial f '(x) is sent to the access module of the lower-level blockchain. When the upper-level blockchain interaction module receives the interaction request sent by the lower-level blockchain interaction module, it verifies the attribute verification information and randomly generates several values of the independent variable x , x∈E, send the values of several independent variables x to the lower-level blockchain interaction module, and after receiving them, the lower-level blockchain interaction module substitutes the values of several independent variables x into the equivalent polynomial f'(x), Obtain the polynomial value of the equivalent polynomial f'(x) and feed it back to the upper-level blockchain interaction module, and the upper-level blockchain module verifies the received polynomial value of the equivalent polynomial f'(x) and the corresponding encrypted polynomial f(x) Whether they match, if they match, it is determined that the verification of the ciphertext verification information passes, otherwise, it is determined that the verification of the ciphertext verification information fails.

Instead, after the audit module of the upper-level blockchain audits the access request, the audit module of the upper-level blockchain generates a decimal g, a positive odd number c, and a positive odd number d, so that g*c*d=(2*k*π)_N , k is a positive integer, N means that the number in brackets retains N decimal places, and the positive odd number d is sent to the access module of the lower-level blockchain, and the upper-level blockchain interaction module receives the interaction request sent by the lower-level blockchain interaction module , after verifying the attribute verification information, randomly generate an integer m, calculate the intermediate value P1=(cos(g*m))_N, and send the intermediate value P1 to the interaction module of the lower-level blockchain, and the lower-level blockchain interaction module uses cosine The double-angle formula of the function calculates the intermediate value P2=(cos(d*g*m))_N, and sends the intermediate value P2 to the upper-level blockchain interaction module, which uses the double-angle formula of the cosine function to calculate the intermediate value P3 =(cos(c*d*g*m))_N, if the absolute value of the difference between P3 and 1 is less than the preset threshold ε, it is determined that the verification of the ciphertext verification information is passed; otherwise, it is determined that the verification of the ciphertext verification information is not valid pass.

As a preference, after the audit module of the node of the upper-level blockchain that receives the access request passes the audit, the access request and the audit result are signed and broadcast in the upper-level blockchain network, and the audit modules of other upper-level blockchain nodes Review the access request. If the review result is consistent with the broadcast review result, add node signatures after the broadcast. After collecting the signatures of the preset number of nodes, the review result of the access request is confirmed, and then the superior who receives the access request The nodes of the blockchain exchange blockchain identification information, identity verification information and agreed secret key with the access module of the lower-level blockchain, and broadcast the agreed blockchain identification information, identity verification information and agreed secret key to the upper-level area Each node of the block chain, after that, the interaction module of the lower-level block chain node can perform data interaction with the interaction module of any node of the upper-level block chain.

A cross-chain operation method of a block chain executed on a block chain cross-chain management system as described above, comprising the following steps: running an interactive program on two block chains, and the interaction between the two block chains Blockchain identification information, identity verification information, and agreed secret key are exchanged between programs, and the identity verification information includes attribute verification information and ciphertext verification information; the block chain node generates an operation request and sends it to any user of the block chain being operated. A node, the operation request includes attribute verification information, ciphertext verification information, data interaction instructions and interaction keys; the node of the operated block chain verifies that both attribute verification information and ciphertext verification information pass, then executes the data interaction instruction, After encrypting the result of the data interaction command with the interaction key, it is fed back to the blockchain node that sent the operation request.

Preferably, the data interaction instruction includes an instruction to read the current block height, an instruction to read specified block data, an instruction to verify transaction specified transaction information, and an instruction to add transaction information. Each data interaction instruction is associated with a permission level. The interactive program of the block chain stores a permission table, and the permission table records the permission level corresponding to the block chain identification information.

Preferably, the method for generating ciphertext verification information includes: wherein an interactive program of a block chain generates a decimal number g, a positive odd number c, and a positive odd number d, so that g*c*d=(2*k*π)_N, k is positive Integer, N means that the number in brackets retains N decimal places, and the positive odd number d is sent to the interactive program of another blockchain. When the interactive program of the operated blockchain receives the operation request, it will verify the attribute verification information. If passed, no operation is performed, otherwise, the integer m is randomly generated, the intermediate value P1=(cos(g*m))_N is calculated, and the intermediate value P1 is sent to the interactive program of the blockchain that sends the operation request, and the operation request is sent The interactive program of the blockchain uses the double-angle formula of the cosine function to calculate the intermediate value P2=(cos(d*g*m))_N, and sends the intermediate value P2 to the interactive program of the operated blockchain, and the operated blockchain The interactive program uses the double angle formula of the cosine function to calculate the intermediate value P3=(cos(c*d*g*m))_N, if the absolute value of the difference between P3 and 1 is less than the preset threshold ε, the ciphertext verification information is determined If the verification is passed, the data interaction instruction is executed; otherwise, it is determined that the verification of the ciphertext verification information fails.

The substantive effect of the present invention is: by establishing a cross-chain interaction or operation mechanism, and establishing an identity verification mechanism, the cross-chain operation and cross-chain management of the blockchain are realized, and the operation safety of the blockchain is guaranteed at the same time; through the cross-chain management Realize the efficient management of multiple business blockchains, ensure the efficient and safe operation of business blockchains, and improve production efficiency; through the improved identity verification mechanism, ensure the security of cross-chain management and cross-chain operations.

Description of drawings

Figure 1 is a schematic diagram of a cross-chain management system in Embodiment 1.

Fig. 2 is a schematic diagram of a management platform program in Embodiment 1.

Fig. 3 is a schematic diagram of an interaction request in Embodiment 1.

Fig. 4 is a schematic diagram of data interaction in Embodiment 1.

Fig. 5 is a schematic flow chart of the cross-chain operation method of Embodiment 1.

Fig. 6 is a schematic flowchart of the method for generating ciphertext verification information in Embodiment 2.

Among them: 100. Blockchain, 200. Management platform program, 1. Access module, 2. Audit module, 3. Interaction module, 4. Interaction request, 41. Blockchain identification information, 42. Identity verification information, 411 , unique identification ID, 421, attribute verification information, 422, ciphertext verification information, 4211, identity information, 4212, blockchain type information, 4213, business attribute information, 4221, secret key information.

detailed description

The specific embodiments of the present invention will be further specifically described below through specific embodiments in conjunction with the accompanying drawings.

Embodiment one:

A blockchain cross-chain management system, used for cross-chain management of several consortium chains and/or private chains, please refer to Figure 1, the cross-chain management system includes 100 in each blockchain that participates in cross-chain management The management platform program 200 is set on the platform, and the management platform program 200 runs on each node of the block chain 100. Please refer to the accompanying drawing 2, the management platform program 200 includes an access module 1, an audit module 2 and an interaction module 3; After the audit module 2 passes the audit, it exchanges the blockchain identification information 41, identity verification information 42 and agreed secret key with the access module 1, and sends them to their respective interaction modules 3 for storage. The interaction module of the lower blockchain 3 Periodically send the interaction request 4 to the interaction module 3 of the superior blockchain.

For example, blockchain A and blockchain B need to be managed on blockchain C. That is, blockchain C is the upper-level blockchain of blockchain A and blockchain B, and the management platform program 200 of any node of blockchain A and blockchain B initiates an access request to blockchain C . The access request is first broadcast among the nodes of blockchain A and blockchain B itself and signatures are collected. When the preset number of signatures are collected, the access request to blockchain C is confirmed by most of the nodes in blockchain A and blockchain B itself, and the node that broadcasts the access request first sends the request to blockchain C. The management platform program 200 of any node sends an access request. The node of blockchain C that receives the access request is audited. If the audit fails, no operation will be performed. If the audit is passed, the access request and audit results will be broadcast among the nodes of blockchain C to obtain the preset After a certain number of nodes sign, it is considered that the access request has been confirmed by blockchain C, and the access of blockchain A and blockchain B is completed.

When the review module 2 reviews the access request, it checks whether the block chain identification information 41 is the identification information that allows access, or whether the format of the block chain identification information 41 meets the preset format requirements. Blockchains that require cross-chain management are usually alliance chains or private chains, and there are business relationships or associations between chains. When deploying a new blockchain, the blockchain identification information 41 of the new blockchain is set according to the preset format. When the newly deployed blockchain sends an access request, the audit module 2 of the superior blockchain audits the block Whether the chain identification information 41 conforms to the preset format can determine whether the block chain that sends the access request is an associated block chain. If the block chain identification information 41 conforms to the preset format, then the audit is passed; otherwise, the audit is not passed.

As an alternative, when a new blockchain is deployed, the blockchain is given a blockchain identifier, and the blockchain identifier is submitted to the existing blockchain for packaged storage. When the newly deployed blockchain sends an access request, the upper-level blockchain queries the data in the block, and if there is a matching blockchain identifier, it is determined that the blockchain identifier information 41 is the identifier information that allows access, and the The access request is approved, otherwise, if no matching blockchain identification information 41 is found in the block, the access request fails the review.

Please refer to accompanying drawing 3, interaction request 4 includes block chain identification information 41 and identity verification information 42, and the interactive module 3 of superior block chain establishes encrypted communication connection with the interactive module 3 of subordinate block chain after verification, and subordinate block chain The interaction module 3 sends the lower-level blockchain operation information to the upper-level blockchain interaction module 3, and the upper-level blockchain interaction module 3 generates transaction information and packs the lower-level blockchain operation information into block storage.

The operation information sent by the lower-level blockchain includes the current block height, the latest block generation time and health status. The health status is the health assessment of a chain by the management platform program 200, that is, if all the nodes of a certain chain are in normal status, then the health status of the chain is "normal"; if some nodes are not in normal status, then the health status of the chain is "Warning"; if all abnormal nodes or the number of abnormal nodes exceeds the preset ratio of all nodes, the health status of the chain is "fault".

The block chain identification information 41 is the unique identification ID411 of the block chain. When the unique identification ID411 is created by the block chain, it is obtained by applying to any block chain node running the management platform program 200. The identity verification information 42 includes attribute verification. Information 421 and ciphertext verification information 422, attribute verification information 421 is the identity information 4211, blockchain type information 4212 and business attribute information 4213 assigned by the upper-level blockchain to the lower-level blockchain when establishing a superior-subordinate relationship. The information 422 is the paired secret key information 4221 agreed between the upper-level blockchain and the lower-level blockchain. When the upper-level blockchain interaction module 3 receives the interaction request 4 sent by the lower-level blockchain interaction module 3, it verifies the interaction request. Whether the unique identification ID411, identity information 4211, blockchain type information 4212 and business attribute information 4213 carried by 4 match the stored ones, if they do not match, the interaction is rejected, and if they match, the ciphertext verification information 422 carried by the interaction request 4 is verified , if the verification fails, the interaction will be rejected. If the verification is passed, the encryption key for this interaction will be generated, and the encryption key will be sent to the interaction module 3 of the lower-level blockchain through the agreed secret key. The interaction module of the lower-level blockchain 3 Use the encryption key to encrypt the blockchain operation information and send it to the interaction module 3 of the upper-level blockchain. The attribute information of blockchain A is: {identity information 4211: SubC-r-A, blockchain type information 4212: private chain, business attribute information 4213: sales business data chain}. That is, blockchain C assigns an identity information 4211, SubC-r-A, to blockchain A, and the format and distribution rules of identity information 4211 are set by blockchain C itself. Blockchain A is a private chain, and the blockchain type information 4212 is a private chain. The business attribute of blockchain A is the sales business data chain. Then, by interacting with blockchain A, blockchain C can obtain the sales data recorded on blockchain A through blockchain C.

The interaction module 3 of the node of the upper-level blockchain sends a data interaction request to the interaction module 3 of the node of the lower-level blockchain. Please refer to the accompanying drawing 4. The data interaction request includes attribute verification information 421, ciphertext verification information 422, and data interaction instructions. and the interaction secret key, the lower-level blockchain interaction module 3 verifies whether the attribute verification information 421 matches the lower-level blockchain, and if it does not match, the interaction is rejected; if it matches, the ciphertext verification information 422 is verified, and if the verification fails, the interaction is rejected , if the verification is passed, the data interaction instruction in the data interaction request will be executed, and the read data will be encrypted with the interaction key and fed back to the upper-level blockchain node, and the upper-level blockchain node will store the obtained data locally. As the upper-level blockchain, it can not only periodically receive the operation information sent by the lower-level blockchain, but also actively query the information of the lower-level blockchain. The way to query data to the lower-level blockchain is to send a data interaction request to the interaction module 3 of any node of the lower-level blockchain. After the attribute verification information 421 and ciphertext verification information 422 carried in the data interaction request pass, the lower-level blockchain The node will execute the data interaction command, query and obtain the data, and then encrypt it with the interaction key and send it to the node that sent the data interaction request. The data obtained by the data interaction command query is stored locally on the node of the upper-level blockchain that initiated the data interaction request. The attribute verification information 421 of the data interaction request refers to the attribute information of the lower-level blockchain. If the verification of the lower-level blockchain is consistent with its own attribute information, the verification is passed. The ciphertext verification information 422 refers to the ciphertext verification information 422 agreed between the upper-level blockchain and the lower-level blockchain when the upper-lower relationship is established. For example, agreeing on a string password, agreeing on a function for timestamps, agreeing on functions for lower-level block heights, etc. In this embodiment, an example is given by specifying an encryption function.

Data interaction instructions include instructions for reading the current block height, instructions for reading specified block data, instructions for verifying transaction specified transaction information, and instructions for adding transaction information. Each data interaction instruction is associated with a permission level, and the interaction of the lower blockchain The module 3 stores a permission table, and the permission table records the permission level corresponding to the block chain identification information 41 . As the best implementation mode, the authority level of the command to read the current block height and the instruction of verifying the specified transaction information is 1, the authority level of the instruction to read the specified block data is 2, and the authority level of the instruction to add transaction information is 2. If the authority level of the upper-level blockchain to the lower-level blockchain is 1, the upper-level blockchain can only read the current block height instruction and verify the specified transaction information instructions for the lower-level blockchain. Through the authority table, it is convenient to set the operation authority of the upper-level blockchain to the lower-level blockchain, which is convenient for the management of multiple blockchains.

After the audit module 2 of the upper-level blockchain audits the access request, the audit module 2 of the upper-level blockchain generates an encrypted polynomial f(x), generates a value set E of the independent variable x, and calculates the encrypted polynomial f(x). The polynomial value on the value set E generates an equivalent polynomial f'(x), the polynomial value of the equivalent polynomial f'(x) on the value set E is the same as the encrypted polynomial f(x), and the equivalent polynomial f' (x) Send to the access module 1 of the lower-level blockchain, when the upper-level blockchain interaction module 3 receives the interaction request 4 sent by the lower-level blockchain interaction module 3, after verifying the attribute verification information 421, randomly generate several self- The value of the variable x, x∈E, sends the values of several independent variables x to the lower-level blockchain interaction module 3, and after receiving the value, the lower-level blockchain interaction module 3 substitutes the values of several independent variables x into the equivalent polynomial f'(x), obtain the polynomial value of the equivalent polynomial f'(x) and feed it back to the upper-level blockchain interaction module 3, and the upper-level blockchain module verifies that the received polynomial value of the equivalent polynomial f'(x) is consistent with the corresponding Whether the encrypted polynomial f(x) matches, if it matches, it is determined that the verification of the ciphertext verification information 422 is passed; otherwise, it is determined that the verification of the ciphertext verification information 422 is not passed. Encryption polynomial f(x)=5*x^2-24*x+16, set the value set E={2,3,4,6,8,9,12}, then the encryption polynomial is on the value set E The range of values is {-12,-11,0,52,144,205,448}. The corresponding generating equivalent polynomial f'(x)=-0.00000116*x^8+0.00007*x^7-0.0017*x^6+0.0234*x^5-0.186*x^4+0.893*x^3+2.5 *x^2-20.23*x+13.69.

When the upper-level blockchain interaction module 3 receives the interaction request 4 sent by the lower-level blockchain interaction module 3, after verifying the attribute verification information 421, it randomly generates the values of several independent variables x, such as generating x=2, 3 and 6, Send x=2, 3 and 6 to the lower-level blockchain interaction module 3, and after the lower-level blockchain interaction module 3 receives it, substitute the values of several independent variables x into the equivalent polynomial f'(x), that is, f' (x)=-0.00000116*x^8+0.00007*x^7-0.0017*x^6+0.0234*x^5-0.186*x^4+0.893*x^3+2.5*x^2-20.23*x +13.69. Obtain f'(2)=-11.95333696, f'(6)=-10.86262076 and f'(6)=54.43236544. The error rates of calculating the three polynomial values are (12-11.95333696)/12=0.38%, (11-10.86262076)/11=1.2% and (54.43236544-52)/52=4.6%, and the errors are all less than 10, then the judgment The polynomial value of f'(x) corresponds to the corresponding encryption polynomial f(x).

After the review module 2 of the upper-level blockchain node that receives the access request passes the review, it signs the access request and the audit result and broadcasts it in the upper-level blockchain network, and the audit module 2 of other upper-level blockchain nodes audits For an access request, if the audit result is consistent with the broadcast audit result, the node signature will be added after the broadcast. After collecting the signatures of the preset number of nodes, the audit result of the access request will be confirmed, and then the upper-level district that receives the access request The node of the block chain exchanges the block chain identification information 41, identity verification information 42 and agreed secret key with the access module 1 of the lower level block chain, and transfers the agreed block chain identification information 41, identity verification information 42 and agreed key Broadcast to each node of the upper-level blockchain, and then the interaction module 3 of the lower-level blockchain node can perform data interaction with the interaction module 3 of any node of the upper-level blockchain.

A cross-chain operation method of blockchain, please refer to attached drawing 5, including the following steps: Step A01) Run interactive programs on two blockchains, and exchange blockchain identifiers between the interactive programs of the two blockchains Information 41, identity verification information 42 and agreed secret key, identity verification information 42 includes attribute verification information 421 and ciphertext verification information 422; Step A02) The blockchain node generates an operation request and sends it to any node of the operated blockchain , the operation request includes attribute verification information 421, ciphertext verification information 422, data interaction instructions and interaction keys; step A03) the node of the operated blockchain verifies that both the attribute verification information 421 and the ciphertext verification information 422 pass, then the execution data Interaction instructions, and the result of the data interaction instruction is encrypted with the interaction key, and fed back to the blockchain node that sent the operation request. By running the interactive program on the blockchain node, according to the predetermined interactive information format and verification information, the cross-chain operation of the blockchain can be realized, and the cross-chain management between multiple blockchains can be realized, which is convenient for the same business. With the management and operation of multiple blockchains, business efficiency is improved.

Data interaction instructions include instructions for reading the current block height, instructions for reading specified block data, instructions for verifying transaction specified transaction information, and instructions for adding transaction information. Each data interaction instruction is associated with a permission level, and the interactive program of the blockchain An authority table is stored, and the authority table records the authority level corresponding to the block chain identification information 41 .

The substantive effect of this embodiment is: by establishing a cross-chain interaction or operation mechanism and establishing an identity verification mechanism, the cross-chain operation and cross-chain management of the blockchain are realized, while ensuring the operation security of the blockchain; Management Realize the efficient management of multiple business blockchains, ensure the efficient and safe operation of business blockchains, and improve production efficiency; through the improved identity verification mechanism, the security of cross-chain management and cross-chain operations is guaranteed.

Embodiment two:

A blockchain cross-chain management system, this embodiment provides a new ciphertext verification information 422 generation scheme on the basis of the first embodiment. In this embodiment, after the audit module 2 of the upper-level blockchain audits the access request, the audit module 2 of the upper-level blockchain generates a decimal g, a positive odd number c, and a positive odd number d, so that g*c*d=(2* k*π)_N, k is a positive integer, N means that the number in brackets retains N decimal places, and the positive odd number d is sent to the access module 1 of the lower-level blockchain, and the upper-level blockchain interaction module 3 receives the lower-level block When the interaction request 4 sent by the chain interaction module 3, after verifying the attribute verification information 421, the integer m is randomly generated, the intermediate value P1=(cos(g*m))_N is calculated, and the intermediate value P1 is sent to the interaction of the lower blockchain Module 3, the lower-level blockchain interaction module 3 uses the double-angle formula of the cosine function to calculate the intermediate value P2=(cos(d*g*m))_N, and sends the intermediate value P2 to the upper-level blockchain interaction module 3, the upper-level block The chain interaction module 3 uses the double angle formula of the cosine function to calculate the intermediate value P3=(cos(c*d*g*m))_N. If the absolute value of P3 is less than the preset threshold ε, it is determined that the verification of the ciphertext verification information 422 is passed. Otherwise, it is determined that the verification of the ciphertext verification information 422 fails.

A cross-chain operation method of a blockchain. Compared with the first embodiment, this embodiment provides an alternative solution for generating ciphertext verification information 422 . Please refer to accompanying drawing 6, in this embodiment, the method for generating ciphertext verification information 422 includes: Step B01) wherein an interactive program of a blockchain generates a decimal g, a positive odd number c, and a positive odd number d, so that g*c*d= (2*k*π)_N, k is a positive integer, N means that the number in the brackets retains N decimal places, and the positive odd number d is sent to the interactive program of another blockchain; step B02) the interaction of the operated blockchain When the program receives the operation request, it verifies the attribute verification information 421. If the verification fails, no operation is performed; otherwise, the integer m is randomly generated; step B03) calculates the intermediate value P1=(cos(g*m))_N, and will The intermediate value P1 is sent to the interactive program of the blockchain that sends the operation request; Step B04) The interactive program of the blockchain that sends the operation request uses the double angle formula of the cosine function to calculate the intermediate value P2=(cos(d*g*m)) _N, send the intermediate value P2 to the interactive program of the operated blockchain; Step B05) The interactive program of the operated blockchain uses the double angle formula of the cosine function to calculate the intermediate value P3=(cos(c*d*g*m) )_N; Step B06) If the absolute value of the difference between P3 and 1 is less than the preset threshold ε, it is determined that the ciphertext verification information 422 has passed the verification, and the data interaction instruction is executed; otherwise, it is determined that the ciphertext verification information 422 has failed the verification.

In this embodiment, the decimal number g=388.95909, the positive odd number c=7 and the positive odd number d=3 are set to satisfy g*c*d=8168.14089=(2*1300*π)_N=8168.14089, where the value of N is 5. The preset threshold ε=0.001.

After receiving the operation request, the interactive program of the operated blockchain verifies the attribute verification information 421 , and continues to verify the ciphertext verification information 422 after the verification is passed. The interactive program of the operated blockchain generates an integer m=5, and calculates the intermediate value P1=(cos(g*m))_N=(cos(388.95909*5))_N=-0.98883. Send P1=-0.98883 to the interactive program of the blockchain that sent the operation request. The interactive program of the blockchain that sends the operation request uses the double angle formula of the cosine function to calculate the intermediate value P2=(cos(d*g*m))_N=(4*P1^3-3*P1)_N=-0.900961652. Then feed back the intermediate value P2 to the interactive program of the operated blockchain. The interactive program of the operated blockchain uses the double-angle formula of the cosine function to calculate the intermediate value P3=(cos(c*d*g*m))_N=(64*P2^7-112*P2^5+56*P2^ 3-7*P2)_N=0.99999. If the difference between the intermediate value P3 and 1 is smaller than the preset threshold ε=0.001, it is determined that the verification of the ciphertext verification information 422 is passed.

Compared with Embodiment 1, the ciphertext verification information 422 provided by this embodiment has higher security, which further improves the security of blockchain cross-chain management and cross-chain operation.

The embodiment described above is only a preferred solution of the present invention, and does not limit the present invention in any form. There are other variations and modifications on the premise of not exceeding the technical solution described in the claims.

Claims (10)

1. A cross-chain management system of blockchain, used for cross-chain management of several alliance chains and/or private chains, characterized in that, Including setting up a management platform program on each block chain participating in cross-chain management, the management platform program runs on each node of the block chain, and the management platform program includes an access module, an audit module and an interaction module, Any node of the lower-level blockchain intends to send an access request to the audit module of the upper-level blockchain through the access module. After the audit module passes the audit, it exchanges blockchain identification information and identity verification with the access module. The information and the agreed secret key are sent to their respective interaction modules for storage, and the interaction module of the lower-level blockchain periodically sends an interaction request to the interaction module of the upper-level blockchain. The interaction request includes blockchain identification information and identity verification information, the interaction module of the upper-level blockchain establishes an encrypted communication connection with the interaction module of the lower-level blockchain after verification, and the lower-level blockchain interaction module sends the operation information of the lower-level blockchain to the interaction module of the upper-level blockchain. The interaction module of the chain generates transaction information and packs the operation information of the lower-level blockchain into block storage. 2. The cross-chain management system of a block chain according to claim 1, characterized in that, The block chain identification information is the unique identification ID of the block chain. When the unique identification ID is created by the block chain, it is obtained by applying to any block chain node running the management platform program. The identity verification information Including attribute verification information and ciphertext verification information, the attribute verification information is the identity information, block chain type information and business attribute information assigned by the upper-level blockchain to the lower-level blockchain when the upper-lower relationship is established, and the ciphertext The verification information is the paired secret key information agreed between the upper-level blockchain and the lower-level blockchain. When the upper-level blockchain interaction module receives the interaction request sent by the lower-level blockchain interaction module, it verifies the unique identifier carried in the interaction request. Whether the ID, identity information, blockchain type information, and business attribute information match the stored ones. If they do not match, the interaction will be rejected. If they match, the ciphertext verification information carried in the interaction request will be verified. If the verification fails, the interaction will be rejected. If the verification is passed, the encryption key for this interaction will be generated, and the encryption key will be sent to the interaction module of the lower-level blockchain through the agreed secret key, and the interaction module of the lower-level blockchain will use the encryption key to encrypt the blockchain operation information After that, it is sent to the interaction module of the upper-level blockchain. 3. The cross-chain management system of a block chain according to claim 2, characterized in that, The interaction module of the node of the upper-level blockchain sends a data interaction request to the interaction module of the node of the lower-level blockchain. The data interaction request includes attribute verification information, ciphertext verification information, data interaction instructions and interaction keys. The chain interaction module verifies whether the attribute verification information matches the lower-level blockchain. If it does not match, it rejects the interaction. If it matches, it verifies the ciphertext verification information. If the verification fails, it rejects the interaction. If it passes the verification, it executes the data interaction request. The data interaction command encrypts the read data with the interaction key and feeds it back to the node of the upper-level blockchain, and the upper-level blockchain node stores the obtained data locally. 4. The cross-chain management system of a block chain according to claim 3, characterized in that, The data interaction instructions include instructions for reading the current block height, instructions for reading specified block data, instructions for verifying transaction specified transaction information, and instructions for adding transaction information. Each data interaction instruction is associated with a permission level. The interaction module stores a permission table, and the permission table records the permission level corresponding to the block chain identification information. 5. A blockchain cross-chain management system according to any one of claims 2 to 4, characterized in that, After the audit module of the upper-level blockchain audits the access request, the audit module of the upper-level blockchain generates the encrypted polynomial f(x), generates the value set E of the independent variable x, and calculates the encrypted polynomial f(x) in the value set The polynomial value on E generates the equivalent polynomial f'(x), the polynomial value of the equivalent polynomial f'(x) on the value set E is the same as the encrypted polynomial f(x), and the equivalent polynomial f'(x) ) to the access module of the lower-level blockchain, when the upper-level blockchain interaction module receives the interaction request sent by the lower-level blockchain interaction module, after verifying the attribute verification information, it randomly generates several values of the independent variable x, x∈ E. Send the values of several independent variables x to the lower-level blockchain interaction module. After the lower-level blockchain interaction module receives them, substitute the values of several independent variables x into the equivalent polynomial f'(x) to obtain the equivalent The polynomial value of the polynomial f'(x) is fed back to the upper-level blockchain interaction module, and the upper-level blockchain module verifies whether the polynomial value of the received equivalent polynomial f'(x) matches the corresponding encrypted polynomial f(x), If they match, it is determined that the verification of the ciphertext verification information passes, otherwise, it is determined that the verification of the ciphertext verification information fails. 6. A blockchain cross-chain management system according to any one of claims 2 to 4, characterized in that, After the audit module of the upper-level blockchain audits the access request, the audit module of the upper-level blockchain generates a decimal g, a positive odd number c, and a positive odd number d, so that g*c*d=(2*k*π)_N, k is A positive integer, N means that the number in the brackets retains N decimal places, and the positive odd number d is sent to the access module of the lower-level blockchain. When the upper-level blockchain interaction module receives the interaction request sent by the lower-level blockchain interaction module, it will verify After attribute verification information, randomly generate an integer m, calculate the intermediate value P1=(cos(g*m))_N, and send the intermediate value P1 to the interaction module of the lower-level blockchain, and the lower-level blockchain interaction module uses the double angle of the cosine function The formula calculates the intermediate value P2=(cos(d*g*m))_N, sends the intermediate value P2 to the upper-level blockchain interaction module, and the upper-level blockchain interaction module uses the double-angle formula of the cosine function to calculate the intermediate value P3=(cos (c*d*g*m))_N, if the absolute value of the difference between P3 and 1 is less than the preset threshold ε, it is determined that the verification of the ciphertext verification information is passed; otherwise, it is determined that the verification of the ciphertext verification information fails. 7. A blockchain cross-chain management system according to any one of claims 1 to 4, characterized in that, After the audit module of the upper-level blockchain node that receives the access request passes the audit, it signs the access request and the audit result and broadcasts it in the upper-level blockchain network, and the audit modules of other upper-level blockchain nodes audit the access Request, if the audit result is consistent with the broadcast audit result, add the node signature after the broadcast, after collecting the signatures of the preset number of nodes, the audit result of the access request is confirmed, and then the upper-level block chain of the access request is received The nodes exchange blockchain identification information, identity verification information and agreed secret key with the access module of the lower-level blockchain, and broadcast the agreed blockchain identification information, identity verification information and agreed secret key to the upper-level blockchain. Each node, after that, the interaction module of the lower-level blockchain node can perform data interaction with the interaction module of any node of the upper-level blockchain. 8. A cross-chain operation method of a blockchain executed on a cross-chain management system of a blockchain according to any one of claims 3 to 7, characterized in that, Include the following steps: Run interactive programs on two blockchains, and exchange blockchain identification information, identity verification information and agreed secret keys between the interactive programs of the two blockchains. The identity verification information includes attribute verification information and ciphertext verification information ; The blockchain node generates an operation request and sends it to any node of the operated blockchain. The operation request includes attribute verification information, ciphertext verification information, data interaction instructions and interaction keys; If both the attribute verification information and the ciphertext verification information of the operated block chain are passed, the data interaction command is executed, and the result of the data interaction command is encrypted with the interaction key, and then fed back to the block chain node that sent the operation request. 9. The cross-chain operation method of a blockchain according to claim 8, characterized in that, The data interaction instructions include instructions for reading the current block height, instructions for reading specified block data, instructions for verifying transaction specified transaction information, and instructions for adding transaction information. Each data interaction instruction is associated with a permission level. The interactive program stores a permission table, and the permission table records the permission level corresponding to the block chain identification information. 10. The cross-chain operation method of a blockchain according to claim 8 or 9, characterized in that, The method for generating ciphertext verification information includes: one of the blockchain interactive programs generates a decimal number g, a positive odd number c, and a positive odd number d, so that g*c*d=(2*k*π)_N, k is a positive integer, and N Indicates that the number in brackets retains N decimal places, and the positive odd number d is sent to the interactive program of another blockchain. When the interactive program of the operated blockchain receives the operation request, it will verify the attribute verification information. If the verification fails, then No operation, otherwise, randomly generate an integer m, calculate the intermediate value P1=(cos(g*m))_N, send the intermediate value P1 to the interactive program of the block chain that sends the operation request, and send the block of the operation request The interactive program of the chain uses the double-angle formula of the cosine function to calculate the intermediate value P2=(cos(d*g*m))_N, and sends the intermediate value P2 to the interactive program of the operated blockchain, and the interactive program of the operated blockchain Use the double-angle formula of the cosine function to calculate the intermediate value P3=(cos(c*d*g*m))_N. If the absolute value of the difference between P3 and 1 is less than the preset threshold ε, it is determined that the verification of the ciphertext verification information has passed. Execute the data interaction instruction, otherwise, it is determined that the verification of the ciphertext verification information fails.

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